[U-Boot] [PATCH v3 4/7] tegra: fdt: Add NAND controller binding and definitions

[Scott Wood]

On 04/17/2012 03:36 PM, Simon Glass wrote:
> Hi Scott,
> 
> On Tue, Apr 17, 2012 at 1:31 PM, Scott Wood <scottwood at freescale.com> wrote:
>> On 04/17/2012 03:18 PM, Simon Glass wrote:
>>> On Tue, Apr 17, 2012 at 12:06 PM, Scott Wood <scottwood at freescale.com> wrote:
>>>> Doesn't the number of cells depend on the GPIO controller binding?
>>>
>>> Yes, but this is the binding Tegra uses.
>>
>> Still, it doesn't belong in the NAND binding.  Maybe a future chip wants
>> to use this NAND binding but a different GPIO binding.  If nothing else,
>> people tend to copy-and-paste such descriptions.  We've still got people
>> adding bindings for Freescale devices saying interrupts are encoded as a
>> pair of cells, even though the interrupt controller now uses four cells
>> per interrupt.
> 
> OK I see - are you are saying that we should just say something like:
> 
> "nvidia,wp-gpios : GPIO of write-protect line, as defined by gpio bindings"

Yes.  If there were more than one GPIO line, you'd specify which one is
which, similar to reg and interrupts.

-Scott